Contour Turning; General Information - Siemens SINUMERIK 840D sl Operating Manual

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Programming technology functions (cycles)

8.3 Contour turning

Contour turning

You can machine simple or complex contours with the "Contour turning" cycle. A contour

comprises separate contour elements, whereby at least two and up to 250 elements result in

a defined contour.

You can program chamfers, radii, undercuts or tangential transitions between the contour

The integrated contour calculator calculates the intersection points of the individual contour

elements taking into account the geometrical relationships, which allows you to enter

incompletely dimensioned elements.

When you machine the contour, you can make allowance for a blank contour which must be

entered before the finished-part contour. Then select one of the the following machining

technologies:

● Stock removal

● Plunge-turning

You can rough, remove residual material and finish for each of the three technologies above.

For example, the programming procedure for stock removal is as follows:

When programming in G code, it must be ensured that the contours are located after the end

of program identifier!

1. Enter the blank contour

2. Enter finished-part contour

3. Contour call - only for G code program

If, when removing stock along the contour, you want to take into account a blank contour

(and no cylinder or no allowance) as blank shape, then you must define the contour of the

blank before you define the finished-part contour. Compile the blank contour step-by-step

from various contour elements.

You build up the finished-part contour gradually from a series of different contour

Operating Manual, 03/2013, 6FC5398-8CP40-3BA1

Sinumerik 828d turning